About Downtime Requirements
The migration process doesn't affect the availability of your existing Oracle Analytics Cloud - Classic instance on Oracle Cloud Infrastructure (Gen 1). Users can continue to sign in and use the service.
Note:
If you do allow users to access and make changes after you've taken the final snapshot for migration, you might need to take another snapshot and repeat the migration if you want to include any changes that they make.After successfully migrating your content, you can reroute users to Oracle Analytics Server.